This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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You're on a roll — I'll continue with the next questions from the image. 1c. Make a list of the components we obtain from mineral oil. From mineral oil (crude oil), we obtain various components through fractional distillation: Liquefied Petroleum Gas (LPG) Gasoline (Petrol) Naphtha Kerosene Diesel oil (Gas oil) Fuel oil Lubricating oils Bitumen (Asphalt) 2c. What are the items included in ocean Resources. Ocean resources include: Marine life: Fish, shellfish, marine mammals, and algae. Minerals: Salt, magnesium, manganese nodules, and offshore oil and natural gas. Energy: Tidal energy, wave energy, and offshore wind energy. Water: Desalinated water for human consumption and agriculture. 3a. How does oxygen occur in nature? Oxygen occurs in nature primarily in two forms: Free state: As a diatomic gas, O_2, in the atmosphere (about 21% by volume) and dissolved in water. It is produced by photosynthesis. Combined state: As a component of water (H_2O), in minerals (e.g., oxides, silicates), and in organic compounds that make up living organisms (e.g., carbohydrates, proteins, fats). 3b. Why should we prevent the wastage of fuel. Preventing fuel wastage is crucial for several reasons: Conservation of Resources: Fuels like fossil fuels are non-renewable and finite. Wastage depletes these resources faster, leaving less for future generations. Economic Savings: Wasting fuel leads to higher costs for individuals, industries, and nations, impacting budgets and economic stability. Environmental Protection: Burning fuels releases greenhouse gases and pollutants, contributing to climate change, air pollution, and health issues. Reducing wastage helps mitigate these environmental impacts. Energy Security: Over-reliance on imported fuels and their rapid depletion due to wastage can compromise a nation's energy security and make it vulnerable to global price fluctuations. 3c. Name the two important stages in the process of obtaining metals from ores? The two important stages in obtaining metals from ores are: Concentration (or Beneficiation): This stage involves removing unwanted impurities (gangue) from the ore to increase the concentration of the metal-bearing mineral. Methods include gravity separation, magnetic separation, and froth flotation. Extraction (or Reduction): This stage involves chemically reducing the concentrated metal compound (usually an oxide or sulfide) to its elemental metallic form. Common methods include smelting (using heat and a reducing agent like carbon) and electrolysis. 4a. What is air pollution? How is it caused? Give any two harmful effects. Air pollution is the presence of harmful substances in the atmosphere, such as gases, particulate matter, and biological molecules, that can cause damage to humans, other living organisms, and the environment. It is primarily caused by human activities like the burning of fossil fuels (from vehicles, industries, power plants), industrial emissions, agricultural activities (e.g., ammonia from fertilizers), and deforestation. Natural sources like volcanic eruptions and wildfires also contribute. Harmful effects: Respiratory and cardiovascular diseases: Pollutants like particulate matter and nitrogen oxides can cause asthma, bronchitis, heart attacks, and strokes. Acid rain: Sulfur dioxide and nitrogen oxides react with water in the atmosphere to form acid rain, which damages forests, aquatic ecosystems, and infrastructure. 4b. Why should we prevent the wastage of fuel? (This question is identical to 3b, and the answer is provided above under 3b.) 4c. Why is the diversity of plants and animals in the forests declining? The diversity of plants and animals in forests is declining due to several factors: Deforestation: Clearing forests for agriculture, logging, urbanization, and infrastructure development directly destroys habitats and displaces species. Habitat Fragmentation: Remaining forest areas are often broken into smaller, isolated patches, which reduces genetic diversity, limits species movement, and makes populations more vulnerable. Climate Change: Changes in temperature and rainfall patterns, increased frequency of extreme weather events, and altered growing seasons stress forest ecosystems, leading to species migration or extinction. Pollution: Air and water pollution (e.g., acid rain, chemical runoff) can directly harm plants and animals, degrade soil quality, and disrupt ecological processes within forests. Invasive Species: Introduction of non-native species can outcompete native plants, prey on native animals, or introduce diseases, further reducing biodiversity. Send me the next one 📸